Jacks are compressed silvery fishes with a pair of dorsal and anal fins, stiff, forked tails and narrow caudal peduncles often protected by a hard ridge of scales known as scutes.  In most species the first three anal fin spines are embedded in the skin just behind the anus.  These carnivorous fishes may form schools or aggregations and occupy a wide range of habitats including estuaries, bays, reefs, and the open sea.  Some species will hunt opportunistically by trailing other carnivores as they forage including eels, sharks, and marine mammals.  Jacks are valuable food and sport fishes but large individuals have been depleted in many areas.  Large Carangids feed heavily upon reef fish so caution is advised as diners run the risk of ciguatera poisoning.

GIANT TREVALLY or WHITE ULUA

BLUEFIN TREVALLY     'OMILU

BIGEYE JACK or PAKE ULUA

BLACK TREVALLY or BLACK ULUA

BARRED JACK

YELLOWSPOT or ISLAND JACK   PAPA ULUA

YELLOW TREVALLY     ULUA PA'OPA'O

COTTONMOUTH JACK

THREADFIN JACK or KAGAMI ULUA

THICKLIPPED JACK or BUTAGUCHI 

GREATER AMBERJACK   KAHALA

HIGHFIN AMBERJACK or ALMACO JACK

YELLOWTAIL

RAINBOW RUNNER

MACKEREL SCAD    'OPELU 

BIGEYE SCAD       'AKULE

LEATHERSKIN or SPOTTED QUEENFISH   LAI

JAPANESE JACK MACKEREL or SCAD    Aji

PACIFIC JACK MACKEREL

BLUE RUNNER

HORSE-EYE TREVALLY